Steam-boiler



@le Model.)

FIG. I.

Cr. S. STRONG.

STEAM BUILER,

fr Sheets-5hee13 1.

4 SheetsSheet 3.

(No Model.)

G. S. STRONG.

STEAM BOILER.

Patented Apr. 14, 1885.

(No Model.) 4 Sheets-Sheet 4. G. S. STRONG.

STEAM BOILER.

No. 315,974. Patented Apr. 1

UNITED STATES PATENT Orifice,

GEORGE S. STRONG, OF PHILADELPHIA, PENNSYLVANIA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 315,974-, dated April 14, 1885.

Application filed November 1, 1884. (No model.) 4

My invention consists of certain improvements, fully described and claimed hereinafter, in the construction of the steam-boiler for which Letters Patent No. 266,551 were granted to me October 24, 1882.

In the accompanying drawings, Figure 1, Sheet 1, is a sectional plan view of a steamboiler made according to my improvements; Fig. 2, Sheet 2, a perspective view, dra-wn to a reduced scale, ofthe outer shell of the boiler; Fig. 3, a perspective view of the inner shell of the fire-boxes and combustion-chamber; Fig. 4, Sheet 3, perspective views ofthe plates used in carrying out part of my improvements; Fig. 5, Sheet 3, perspective views of modified forms of the plates shown in Fig. 4 5 Fig. 6, Sheet 4, views of plates which may be used in constructing the outer shell of the boiler; and Figs. 7, 8, 9, and 10, Sheet 4, views illustrating the inode of constructing the outer shells of the fire-boxes.

Referring to Figs. 1, 2, and 3, A. and A' are the outer shells of the two lire-boxes; B, the barrel of the boiler, and D the shell of the smoke-box, E E' being the two corrugated inner shells of the fire-box; F, the corrugated shell of the combustion-chamber; G, one tubesheet; G', the opposite tube-sheet, and H the system of tubes.

As regards general arrangement, the abovementioned parts are the same as those described in the above-mentioned patent. Two of the features of my present invention relate to the parts where the two inner corrugated shells of the tire-box merge into the shell of the combustion-chamber, and the part where two outer shells of the hre-box merge into the shell of the barrel B of the boiler. In my former patent each inner shell of the hre-box had a rounded end and was connected with the rounded end of the shell of the combustion-chamber by a short tube. I discard this plan for the more substantial and safe connection, which 5o I will proceed to explain.

nects the two inner shells, E E', of the rebox-that is, the portion between the dotted lines x and y in Figs. 1 and 4-in the manner which can be best described in connection with the perspective views, Fig. 4, Sheet 3. The connection consists of three plates-namely, the central or gusset plate, H', and the two side plates, I I-all shaped by pressure between dies. The central plate, H', has two semicircular ends, c c', the former being made to project into or overlap one half, or thereabout, of the circular end of the inner shell, E, of the fire-box, and the latter to project into or overlap one hall', or thereabout, of the circular end of the other inner shell, E', of the fire-box, the end b of the side plate I being made to project'into or overlap the other half ofthe end of the shell E, and the end b' of the side plate I to project into or overlap the other half of the shell E'. The opposite semicircular end, d, of the side plate I is formed to project into or overlap one half of the circular end c of the shell F of the combustionchamber, and thc semicircular end d of the side plate I projects into or overlaps the other half of the said circular end of the shell F of the combustion-chamber. The inclined edges f and 7L of the central gusset-plate, H', coincide respectively with the edges f' and h of the side plate I, and the edges m and n of the gusset-plate with the edges in' and n' of the side plate I'.

As regards the junction of the several plates H', I, and I with each other, I prefer to make them with butt-joints and to connect them together by means of inner and outer strips and rivets in awell-known manner, the side plates, I I', being riveted directly at one end to the shell of the combustion-chamber, and at the opposite ends to the shell of the lire-box, to which are also secured the two semicircular ends oi' the gusset-plate H'.

A slightly-diiierent arrangement of connecting-plates is shown in the diagram, Fig. 5.

I prefer in all cases to corrugate the side plates, I I', as shown in Figs. l and 3.

As regards the connection ofthe outer shells of the lire-box with the barrel of the boiler, precisely the same plates may be employed as those described above, or two die-pressed connecting-plates, IV W', (which will be readily ICO E. Gr. STUDLEY 8a P. BOSCH.

FLY NET.

Patented Apr. 14, 1885.

175mg@ al@ 

